Dehydrating classifier for sand and gravel plants



Jan. 5, 1932. o. E. PERKINS 1,839,804

I DEHYDRATING CLASSIFIER FOR SAND AND GRAVEL PLANTS Filed March 17, 1930 s Sheets-Sheet 1 INVENTOR 07/5 5 Fab/HMS Jan. 5, 1932. o. E. PERKINS 3,839,304

DEHYDRATING CLASSIFIER FOR SAND AND GRAVEL PLANTS Filed March 17, 1930 3 Sheets-Sheet 2 v 07/15 5 R w/27.5 I o \INVENTOR Jan. 5, 1932.

0. E. PERKINS DEHYDRATING CLASSIFIER FOR SAND AND GRAVEL PLANTS Filed March 17, 1950 5 Sheets-Sheet 3 0/115 5 76r/ri/1 INVENTOR ATTORN Patented Jan. 5, 1932 S AT OTIS n. PERKINS, or PORTLAN onEGoN DEHYDRATING CLASSIFIER ion snma AND GRAVEL PLANTS Application filed March 17, 1930. Serial No. 436,519.

My invention relates to classifiers-and dehydrating plants for the treatment of sand, gravel, ore and other products wherein it is found desirable toseparate and classify materials of different sizes andspecific gravities.

My invention in its preferred embodiment consists in a'liquid holding hopper having'a chute for conducting materials into the hopper and having a dehydrating and classifying wheel being partitioned at its center in order that classifying of dilferent materials and classes may be executed from the same operation. The wheel has 'a plurality of spokes, or blades, disposed thereinthat are adapted for carrying the products placed within the hopper and elevating and classlfying the same. A shield is disposed ad acent the line of travel of the blades forpredetermining the position at which the deposits will be made from the blades into the discharge outlet and back into the tank, or vat, the shield being movable to eifect the classification desired. A damper is also disposed within the wheel. A counterweighted hammer is adapted to engage the outer periphery of each of the blades and to be are tuated thereby as the wheel is rotated, to thereby impart a hammer blow to each blade as the same is rotated past the counterweighted hammer, the purpose of which is to free the blade from any precipitated residue that may be left clinging thereto when the blade'reaches substantially its highest point of travel. i I

The object of my invention is to'dehydrate and classify ore, rock, sand and gravel products.

A further object of my invention consists in providing a speed adjustment and a shield disposed in the line of travel of the spoke blades, the manipulation'of the speed of the wheel, the location of the shield, or the manipulation of both, determining the classi- 45 fication that is to be accomplished. and'the delivery of the same into I predetermined groups.

A further object of my invention consists in providing a simplemeans requiring a minimum amount of power for the classify- -44 of Fig. dicated.

Fig. 5 is a sectional end view of the mechanism illustrated in Fig. 2, the same being 'Journalboxes 2-and 3 are disposed upon oping of products and eliminating the water that is normally disposed therein in the washing and treating process to which these products aresubjected in the segregating of the same into desired classifications and groups.

Heretofore it has been'the general custom in devices of this kind to effect the separation and classification in'a number of ways, all of which required a substantial amount of power. The methods were also expensive in 6 first cost and efiected the classification only in a general manner, but with little accuracy,

noprovision being made for the effecting of the classification and separation of the different grades into groups, that is now made possible through the use of my new and improved device. 7

With these and incidental objects in view, the invention consists in certain'novel features of construction and combination of '70 parts, the essentialelements of which are set forth in the appended claims, and a preferred form of embodiment of which is hereinafter shown withreference to the drawings which iiccompany and form a part of this specificaion. 1

In the drawings: Fig. l is an end view of a battery of classifier wheels shown in use in tandem. I

Fig. 2 is a top plan view partially in sec- '80 tion, ofa duplex wheel.

Fig.3 is a sectional side view of the wheel illustrated in Fig. 2.

Fig. 4 is a sectional end view of the assembled wheel,-the same being taken on line 2, looking in the direction intaken' on line 55 of Fig. 2, looking in the 9 direction indicated. i

- Fig.6 is a fragmentary sectional end view of the mechanism illustrated in Fig. 2, the same being taken on line66 of Fig.2, look ing in the direction indicated. 1

- Like reference characters refer to like parts holding vat 1, made of any suitable material.

positely disposed sides of the vat into which a primary driving shaft 4 is journaled. The shaft is driven by any suitable power means that will impart controllable and predetermined speeds to the shaft. The power may be supplied by an electric motor 6. I have found splendid results may be obtained by a rheostat control, not here shown, disposed at a convenient place so that the electric current will pass therethrough and having a speed reducer 7 interposed between the prime mover and the sprocket 5. The sprocket 5 is disposed upon the shaft 4 witha suitable driving element 8, as a chain, being trained about the sprocket 9 that is disposed upon the speed reducer shaft 10, and the sprocket 5.

A wheel is disposed upon the shaft 4: and 1 preferably make the wheel of hubs 11 and 12 the center ring 13 and the end rings 16 and 17. Each of the spokes are formed of two :legs 19 and 20. Thelegs are disposed substantially at right angles to each lother with a fillet 21 disposed .therebetween. The ob- 'jcct ofthe fillet is to facilitatethe free flowing of the material from the paddles :thatis to be classified. The material to be classified, is admitted into the vat, as by a chute 22. The wheel therein is run counter clockwise, as illustrated in Fig. 4. The level at which the material, including the water, will rise within the box-like container 1 is predetermined by a movable baflie plate 23 that is interposed between the wall of the container and the outlet overflow spout 24. The revolving of the wheel'within the vat agitates the -contents thereof and the position of the baffle posed within the line of movement of the wheel and in substantially close proximityito the inner edges 26' of the paddle spokes and in this manner confines the material fora short distance of the travel of the wheel. After the settlement has occurred upon the paddle,the water is permitted to flow off of-the settled mass .asthe wheel is revolving. A second manually settable shield 27 is interposed within the line of travel of the wheel. The settable shield 27 has an outwardly extending ledge 28 which is in close proximity to the inner edge 26'of the paddle spokes.

The settable shield 27 is adapted for being manipulated .by a hand lever 32, as shown in Fig. 6. A quadrant 33 is positioned in the line of travel of the handle 32. The handle may be locked relative to the quadrant by the locking pin 3l passing through the handle and into the locking holes disposed within the quadrant 33. Side bars connect the handle 32 with the shield element 27 and the ledge 28. 1

The classification of the material, to be handled by the wheel is determined by the speed of the wheel and the location of the shield 27 and of the ledge 28 relative to the paddles and to the discharge chute 29. The

. side wallsof the chute 29 are preferably made at an obtuse angle to the base 30 thereof in order that a wing baifle 31 may be disposed within the line of travel of the wheel. The wing baffle 31 is hinged to the chute 29 and is positionable by the handle36, that is secured to the rod 37 to which the bafile 31 is secured. A quadrant 38 is interposed in the line oftravel of the handle 36 and the handle is lockable relative to the quadrant by the locking pin 39. The position of the hinged baffle 31 determines the amount of the wash that Will occur in the materials being flushed from the spoke blade as it passes between the space disposed in the line of travel between the shield 25 and the settable shield 27 and the ledge 28.

To insure the freeing of the mass disposed upon the spoked blades, a counterweighted hammer 40 is interposed in the line of travel ofthe blades. The counterweighted hammer is hingedly mounted upon a supporting pin 41. ,As-the free end 42 of the hammer element .passes over, and is freed from the spoke passing there past the counterweighted hammer d-ropsand strikes the next succeeding spoked blade, this being accomplished when the blade is substantially vertical to thereby insure the freeing of the mass yet remaining within the spoke blade.

These classifiers may be disposed in tandem or in battery formation, as illustrated in 'Fig. l. "The receiving tank 43 constitutes the primary receiving tank, and the overflow chute 44 carries the flushed material from the tank and redeposits the same into a tank 45 disposed therebelow. This classification maybe carried on in stages until the desired degree of fineness has finally been While the form of mechanism herein shown and described is admirably adapted to fulfill the objects primarily stated it is to be understood that it is not intended to confine the invention to the one form of embodiment herein shown and described, as it is susceptible of embodiment in various forms, all coming within the scope of the claims which follow.

What I claim is:

1. In a device of the class described, the combination of a liquid holding vat, a shaft disposed transversely of the vat and journaled relative thereto, means for driving the shaft .at predeterminable speeds, flanged hubs disposed upon the shaft, a plate disposed between the fianges disposed upon the hub, rings disposed in spaced relationship with the central plate and spaced apart therefrom by spoke blades formed of leg elements with a fillet disposed between the legs, an inlet chute for delivering materials to be classified within the vat, an adjustable baffie plate placed within the overflow from the vat, a plurality of shields interposed in the 1 line of travel of the spoke blades, one of which is manually positionable, and a hinged adjustable bafile damper downwardly extending into the mass to be classified.

2. In a device of the class described, the combination of a liquid holding vat, a shaft disposed horizontally within and transversely of the vat and journaled relative thereto, means for driving the shaft at predeterminable speeds, an openly constructed wheel composed of .a central plate and having ring blades spaced apart by spoke blades, that are spaced apart relative to each other, means for conducting materials into the vat, means for predetermining the height level of the overflow from the vat, discharge spouts running from each side of the wheel, and means at which the discharge from the spoke blades will enter the discharge spout.

3. In a device of the class described, the combination of a vat, a partitioned wheel revolvably'disposed within the vat, paddles disposed within the wheel, each paddle having a leg outwardly extending from the body portion thereof with a fillet disposed between the body portion and the leg of the paddle a fixed bafiie shield and a plurality of adjustable shields disposed within the vat.

i. In a device of the class described, the combination of a liquid-holding vat, a shaft journaled relative to the vat and a wheel disposed upon the shaft, spaced paddles disposed within the wheel, a fixed shield and one or more adjustable shields disposed'relative to the paddles within the wheel, and a discharge outlet leading from the center of the wheel.

OTIS E. PERKINS. 

